<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>

  <div id="app">
    <button-counter></button-counter>
    <button-counter></button-counter>
  </div>
  
  <script src="../js/vue.js"></script>
  <script>
    // 注册全局组件
    Vue.component('button-counter', {
      data () {
        return {
          count: 0
        }
      },
      // data: {
      //     count: 0
      // },
      template: `<button @click="count += 1">点击了{{count}}</button>`
    })

    new Vue({
      el: '#app',
    })
  
  </script>
</body>
</html>